/*
* test_urcu_lfs.c
*
- * Userspace RCU library - example RCU-based lock-free stack
+ * Userspace RCU library - example lock-free stack
*
- * Copyright February 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright 2010-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
* Copyright February 2010 - Paolo Bonzini <pbonzini@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
#include <unistd.h>
#include <stdio.h>
#include <assert.h>
-#include <sys/syscall.h>
-#include <sched.h>
#include <errno.h>
#include <urcu/arch.h>
+#include <urcu/tls-compat.h>
+#include "cpuset.h"
+
+#ifdef __linux__
+#include <syscall.h>
+#endif
/* hardcoded number of CPUs */
#define NR_CPUS 16384
#define _LGPL_SOURCE
#endif
#include <urcu.h>
-#include <urcu/rculfstack.h>
-#include <urcu-defer.h>
+#include <urcu/cds.h>
+
+/*
+ * External synchronization used.
+ */
+enum test_sync {
+ TEST_SYNC_NONE = 0,
+ TEST_SYNC_RCU,
+};
+
+static enum test_sync test_sync;
static volatile int test_go, test_stop;
/* read-side C.S. duration, in loops */
static unsigned long wdelay;
-static inline void loop_sleep(unsigned long l)
+static inline void loop_sleep(unsigned long loops)
{
- while(l-- != 0)
+ while (loops-- != 0)
caa_cpu_relax();
}
static int verbose_mode;
+static int test_pop, test_pop_all;
+
#define printf_verbose(fmt, args...) \
do { \
if (verbose_mode) \
- printf(fmt, args); \
+ printf(fmt, ## args); \
} while (0)
static unsigned int cpu_affinities[NR_CPUS];
pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
-#ifndef HAVE_CPU_SET_T
-typedef unsigned long cpu_set_t;
-# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
-# define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
-#endif
-
static void set_affinity(void)
{
+#if HAVE_SCHED_SETAFFINITY
cpu_set_t mask;
- int cpu;
- int ret;
+ int cpu, ret;
+#endif /* HAVE_SCHED_SETAFFINITY */
if (!use_affinity)
return;
return !test_stop;
}
-static unsigned long long __thread nr_dequeues;
-static unsigned long long __thread nr_enqueues;
+static DEFINE_URCU_TLS(unsigned long long, nr_dequeues);
+static DEFINE_URCU_TLS(unsigned long long, nr_enqueues);
-static unsigned long long __thread nr_successful_dequeues;
-static unsigned long long __thread nr_successful_enqueues;
+static DEFINE_URCU_TLS(unsigned long long, nr_successful_dequeues);
+static DEFINE_URCU_TLS(unsigned long long, nr_successful_enqueues);
static unsigned int nr_enqueuers;
static unsigned int nr_dequeuers;
-static struct cds_lfs_stack_rcu s;
+struct test {
+ struct cds_lfs_node list;
+ struct rcu_head rcu;
+};
-void *thr_enqueuer(void *_count)
+static struct cds_lfs_stack s;
+
+static void *thr_enqueuer(void *_count)
{
unsigned long long *count = _count;
printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
- "enqueuer", pthread_self(), (unsigned long)gettid());
+ "enqueuer", (unsigned long) pthread_self(),
+ (unsigned long) gettid());
set_affinity();
cmm_smp_mb();
for (;;) {
- struct cds_lfs_node_rcu *node = malloc(sizeof(*node));
+ struct test *node = malloc(sizeof(*node));
if (!node)
goto fail;
- cds_lfs_node_init_rcu(node);
- /* No rcu read-side is needed for push */
- cds_lfs_push_rcu(&s, node);
- nr_successful_enqueues++;
+ cds_lfs_node_init(&node->list);
+ cds_lfs_push(&s, &node->list);
+ URCU_TLS(nr_successful_enqueues)++;
- if (unlikely(wdelay))
+ if (caa_unlikely(wdelay))
loop_sleep(wdelay);
fail:
- nr_enqueues++;
- if (unlikely(!test_duration_enqueue()))
+ URCU_TLS(nr_enqueues)++;
+ if (caa_unlikely(!test_duration_enqueue()))
break;
}
rcu_unregister_thread();
- count[0] = nr_enqueues;
- count[1] = nr_successful_enqueues;
+ count[0] = URCU_TLS(nr_enqueues);
+ count[1] = URCU_TLS(nr_successful_enqueues);
printf_verbose("enqueuer thread_end, thread id : %lx, tid %lu, "
"enqueues %llu successful_enqueues %llu\n",
- pthread_self(), (unsigned long)gettid(), nr_enqueues,
- nr_successful_enqueues);
+ pthread_self(),
+ (unsigned long) gettid(),
+ URCU_TLS(nr_enqueues), URCU_TLS(nr_successful_enqueues));
return ((void*)1);
}
-void *thr_dequeuer(void *_count)
+static
+void free_node_cb(struct rcu_head *head)
+{
+ struct test *node =
+ caa_container_of(head, struct test, rcu);
+ free(node);
+}
+
+static
+void do_test_pop(enum test_sync sync)
+{
+ struct cds_lfs_node *snode;
+
+ if (sync == TEST_SYNC_RCU)
+ rcu_read_lock();
+ snode = __cds_lfs_pop(&s);
+ if (sync == TEST_SYNC_RCU)
+ rcu_read_unlock();
+ if (snode) {
+ struct test *node;
+
+ node = caa_container_of(snode,
+ struct test, list);
+ if (sync == TEST_SYNC_RCU)
+ call_rcu(&node->rcu, free_node_cb);
+ else
+ free(node);
+ URCU_TLS(nr_successful_dequeues)++;
+ }
+ URCU_TLS(nr_dequeues)++;
+}
+
+static
+void do_test_pop_all(enum test_sync sync)
+{
+ struct cds_lfs_node *snode;
+ struct cds_lfs_head *head;
+ struct cds_lfs_node *n;
+
+ head = __cds_lfs_pop_all(&s);
+ cds_lfs_for_each_safe(head, snode, n) {
+ struct test *node;
+
+ node = caa_container_of(snode, struct test, list);
+ if (sync == TEST_SYNC_RCU)
+ call_rcu(&node->rcu, free_node_cb);
+ else
+ free(node);
+ URCU_TLS(nr_successful_dequeues)++;
+ URCU_TLS(nr_dequeues)++;
+ }
+
+}
+
+static void *thr_dequeuer(void *_count)
{
unsigned long long *count = _count;
- int ret;
printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
- "dequeuer", pthread_self(), (unsigned long)gettid());
+ "dequeuer", (unsigned long) pthread_self(),
+ (unsigned long) gettid());
set_affinity();
- ret = rcu_defer_register_thread();
- if (ret) {
- printf("Error in rcu_defer_register_thread\n");
- exit(-1);
- }
rcu_register_thread();
while (!test_go)
}
cmm_smp_mb();
- for (;;) {
- struct cds_lfs_node_rcu *node;
+ assert(test_pop || test_pop_all);
- rcu_read_lock();
- node = cds_lfs_pop_rcu(&s);
- rcu_read_unlock();
- if (node) {
- defer_rcu(free, node);
- nr_successful_dequeues++;
+ for (;;) {
+ unsigned int counter = 0;
+
+ if (test_pop && test_pop_all) {
+ /* both pop and pop all */
+ if (counter & 1)
+ do_test_pop(test_sync);
+ else
+ do_test_pop_all(test_sync);
+ counter++;
+ } else {
+ if (test_pop)
+ do_test_pop(test_sync);
+ else
+ do_test_pop_all(test_sync);
}
- nr_dequeues++;
- if (unlikely(!test_duration_dequeue()))
+
+ if (caa_unlikely(!test_duration_dequeue()))
break;
- if (unlikely(rduration))
+ if (caa_unlikely(rduration))
loop_sleep(rduration);
}
rcu_unregister_thread();
- rcu_defer_unregister_thread();
printf_verbose("dequeuer thread_end, thread id : %lx, tid %lu, "
"dequeues %llu, successful_dequeues %llu\n",
- pthread_self(), (unsigned long)gettid(), nr_dequeues,
- nr_successful_dequeues);
- count[0] = nr_dequeues;
- count[1] = nr_successful_dequeues;
+ pthread_self(),
+ (unsigned long) gettid(),
+ URCU_TLS(nr_dequeues), URCU_TLS(nr_successful_dequeues));
+ count[0] = URCU_TLS(nr_dequeues);
+ count[1] = URCU_TLS(nr_successful_dequeues);
return ((void*)2);
}
-void test_end(struct cds_lfs_stack_rcu *s, unsigned long long *nr_dequeues)
+static void test_end(struct cds_lfs_stack *s, unsigned long long *nr_dequeues)
{
- struct cds_lfs_node_rcu *node;
+ struct cds_lfs_node *snode;
do {
- node = cds_lfs_pop_rcu(s);
- if (node) {
+ snode = __cds_lfs_pop(s);
+ if (snode) {
+ struct test *node;
+
+ node = caa_container_of(snode, struct test, list);
free(node);
(*nr_dequeues)++;
}
- } while (node);
+ } while (snode);
}
-void show_usage(int argc, char **argv)
+static void show_usage(int argc, char **argv)
{
- printf("Usage : %s nr_dequeuers nr_enqueuers duration (s)", argv[0]);
- printf(" [-d delay] (enqueuer period (in loops))");
- printf(" [-c duration] (dequeuer period (in loops))");
- printf(" [-v] (verbose output)");
- printf(" [-a cpu#] [-a cpu#]... (affinity)");
+ printf("Usage : %s nr_dequeuers nr_enqueuers duration (s) <OPTIONS>\n",
+ argv[0]);
+ printf("OPTIONS:\n");
+ printf(" [-d delay] (enqueuer period (in loops))\n");
+ printf(" [-c duration] (dequeuer period (in loops))\n");
+ printf(" [-v] (verbose output)\n");
+ printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
+ printf(" [-p] (test pop)\n");
+ printf(" [-P] (test pop_all, enabled by default)\n");
+ printf(" [-R] (use RCU external synchronization)\n");
+ printf(" Note: default: no external synchronization used.\n");
printf("\n");
}
case 'v':
verbose_mode = 1;
break;
+ case 'p':
+ test_pop = 1;
+ break;
+ case 'P':
+ test_pop_all = 1;
+ break;
+ case 'R':
+ test_sync = TEST_SYNC_RCU;
+ break;
}
}
+ /* activate pop_all test by default */
+ if (!test_pop && !test_pop_all)
+ test_pop_all = 1;
+
printf_verbose("running test for %lu seconds, %u enqueuers, "
"%u dequeuers.\n",
duration, nr_enqueuers, nr_dequeuers);
+ if (test_pop)
+ printf_verbose("pop test activated.\n");
+ if (test_pop_all)
+ printf_verbose("pop_all test activated.\n");
+ if (test_sync == TEST_SYNC_RCU)
+ printf_verbose("External sync: RCU.\n");
+ else
+ printf_verbose("External sync: none.\n");
printf_verbose("Writer delay : %lu loops.\n", rduration);
printf_verbose("Reader duration : %lu loops.\n", wdelay);
printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
- "main", pthread_self(), (unsigned long)gettid());
+ "main", (unsigned long) pthread_self(),
+ (unsigned long) gettid());
tid_enqueuer = malloc(sizeof(*tid_enqueuer) * nr_enqueuers);
tid_dequeuer = malloc(sizeof(*tid_dequeuer) * nr_dequeuers);
count_enqueuer = malloc(2 * sizeof(*count_enqueuer) * nr_enqueuers);
count_dequeuer = malloc(2 * sizeof(*count_dequeuer) * nr_dequeuers);
- cds_lfs_init_rcu(&s);
+ cds_lfs_init(&s);
+ err = create_all_cpu_call_rcu_data(0);
+ if (err) {
+ printf("Per-CPU call_rcu() worker threads unavailable. Using default global worker thread.\n");
+ }
next_aff = 0;
tot_successful_enqueues,
tot_successful_dequeues + end_dequeues);
+ free_all_cpu_call_rcu_data();
free(count_enqueuer);
free(count_dequeuer);
free(tid_enqueuer);
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